body,div,ul,li,p,a,span{ margin:0px; padding:0px; }
a{outline:none;blr:expression(this.onFocus=this.blur());}
ul{ list-style: none; }
.left_nav{ background-color: #192a54; width: 200px;overflow: hidden;}
.nav1{ overflow-y: scroll; width: 250px;  height: 100vh}
.nav1 li{ display: block; border-top: 1px solid #3A496C; border-bottom: 1px solid #101B35; color: #fff; line-height: 44px;}
.nav1 a{ color: #fff; line-height: 44px; display: block; height: 44px; text-decoration: none;padding-left: 20px; }
.nav2 { background-color: #101a33; display: none; transition: all; .3s; z-index:99  }
.nav2 li{ display: block; border-top:none; border-bottom: none; color: #ccc; line-height: 44px; padding-left: 10px;}




